Earth-anchor.



152B. MILLER,

EARTH ANCHOR.

APPLICATION IILED JAN. 22, 1910.

Patented July 12, 1910,

FRANK B. MILLER, or NORWALK, o'HIo.

EARTH-ANCHOR.

'S pe'ciflcationof Letters'Patent. Pate'ntd July 12, 1910.

Application filed January 22, 1910. Serial No. 539,611.

To all whom it may concern:

I Be it known that I, FRANK B. MILLER, a citizen of the United States,and resident of Norwalk, in the county of Huron and State of Ohio, haveinvented certain new and useful Improvements in Earth-Anchors, of

which I hereby declare the following to be a full, clear, and exactdescription, such as will enable others skilled in the art to which itappertains to make and use the same.

The objects of the invention are to provide an expansible retaininganchor for telegraph, telephone and electric trolley wire supports, orpoles, the primary improve ment therein having reference to the positiveand powerful mechanism employed to expand or laterally elongate thesame.

The invention is designed for use in the bottom of a hole du in theearth, and the expansible ortion o the anchor is adapted to be exten edlaterally beyond the sides of the hole and thereby to take advantage ofthe weight of the solid earth above its expanded edges.

The devlce is used in connection with a straining rod or draw bar towhich a straining or tension rope is attached which connects the drawbar with the pole and needs no further description herein.

The invention comprises a central body and stem and laterally movablemembers and instrumentalities for giving a direct and positive movementto said members, which is equally powerful throughout all portions ofthe movement. 7

The device is hereinafter further described, shown in the accompanyingdraw- In these views 1 is a preferably circular or disk shaped baseplate in which is loosely secured the lower end of the draw bar, 2.

Upon this base rests the laterally movable anchor members or flukes 3,3, which slide upon the body portion 1 and are radially slotted at 4:,4, to receive the draw bar 2.

Upon the lower surface of each anchor fluke is shown a lug5 which isadapted to enter the diametrical slot 6, in the base portion 1, andguides the anchor members as they are moved in and out upon the baseportion which is designed to remain stationary in the bottom of thehole. To operate the anchor members 3, 3, a disk 7 is secured to thedraw bar 2, and upon the underside of this is shown a vertical spiral orcam shaped flange 8 which is adapted to en age the rack teeth 9, 9, uponthe upper sur aces of the anchor members 3, 3, and draw them in and outsimultaneously in opposite directions as the disk 7 is rotated. Thls maybe accomplished by means of any suitablewrench such as shown at 10 inFig. 5, and the prime feature of advantage gained is found in thepositive movement resulting from the action of the spiral flange, sincethe anchor members are moved with equal power at all times. The anchormembers are preferably duplicates and two in number but any numbersuitably spaced can be employed. A shoulder or thimble such as a uponthe rod 2 prevents the retaining nut N at the lower end of the rod frombinding upon the parts so as to prevent movement thereof.

Having described the invention, what I claim as new and desire to secureby Letters Patent'is:

1. In an earth anchor, a base plate, a draw bar loosely connectedtherewith, a pair of anchor members or fiukes, diametrically andlaterally movable on said base plate, a rack on each anchor member, anda spiral engaging device for said racks, said spiral engaging deviceoperatively connected with sa1d draw bar.

2. In an earth anchor, in combination, a base plate, a draw bar, looselyconnected therewith, diametrically movable anchor,

members or flukes slidingly mounted upon said spiral engaging deviceoperatively eonsaid base plate, said base plate provided with nectedwith said draw bar. 10

a guiding means operatively connected with In testimony whereof, Ihereunto set my a corresponding guiding means in said hand thls 4th dayof December 1909.

anchor members, a radial rack on each FRANK B. MILLER. anchor member, aspiral engagin device In presence of therefor, whereby said anchor memers are EDGAR L. MARTIN,

simultaneously moved in opposite directions, C. P. VENUS.

